Alert archive / Illinois / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 56, NWS St. Louis, MO

May 25, 1990Monroe County, Saint Clair County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at May 25, 1990, 7:06 PM CDT for Monroe County, Saint Clair County, Illinois. It was in force for 39 min.

The area

The counties it named.

The facts

Issued
May 25, 1990, 7:06 PM CDT (00:06 UTC)
Expired
May 25, 1990, 7:45 PM CDT
In force
39 min
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Monroe County, IL, Saint Clair County, IL

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Paducah/Barkley, KY (KPAH), launched 00:00Z, 0.1 hours before the alert went out and 188 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Paducah/Barkley, KY at 00:00Z on 1990-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1797 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Paducah/Barkley, KY at 00:00Z on 1990-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 316 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1797 J/kg
Mixed-layer CIN
-67 J/kg
Mixed-layer LCL
771 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
316 m²/s²
0-3 km storm-relative helicity
509 m²/s²
Significant tornado parameter
3.3
Supercell composite
17.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSTL 260007
SVRSTL
ILC133-163-260045-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
706 PM CDT FRI MAY 25 1990
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  745 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTHWEST ILLINOIS
          ...NORTHERN MONROE...SOUTHERN ST CLAIR
 
AT 705 PM...1 INCH HAIL WAS REPORTED IN ARNOLD...IN ST LOUIS COUNTY.JULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.
 
FELDT

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, May 25, 2:01 PM CDT, 5 hours 5 minutes before
MOZ022-023-252100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
200 PM CDT FRI MAY 25 1990

...THE SEVERE THUNDERSTORM WATCH FOR SOUTHEAST MISSOURI IS CANCELLED...

THE THREAT OF SEVERE WEATHER HAS PASSED FOR SOUTHEAST MISSOURI.

A SLIGHT RISK OF SEVERE THUNDERSTORMS CONTINUES FOR ALL BUT NORTHERN
MISSOURI THIS AFTERNOON AND TONIGHT.

EISE
Special weather statement, May 25, 6:27 PM CDT, 39 minutes before
MOZ009-010-014-260030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MO
625 PM CDT FRI MAY 25 1990

...STRONG THUNDERSTORMS WERE DEVELOPING OVER WEST CENTRAL MISSOURI...
...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR CENTRAL AND SOUTHWEST
MIISOURI UNTIL MIDNIGHT...

AT 625PM THE COLUMBIA WEATHER RADAR INDICATED TWO...STILL DEVELOPING...
THUNDERSTORMS JUST NORTHWEST OF THE CITY OF SEDALIA MOVING EAST AT
25 MILES AN HOUR.
THESE STORMS WILL PASS JUST NORTH OF SEDALIA WITHIN THE NEXT 30 MINUTES...
CARRYING THE POTENTIAL FOR HEAVY RAINS...HAIL...AND STRONG GUSTY WINDS.
OTHER...POTENTIALLY SEVERE...STORMS 50 MILES WEST OF SEDALIA WILL BE MOVING
INTO SOUTHERN PETTIS COUNTY AFTER 700 PM.
PERLOW
Special weather statement, May 25, 6:50 PM CDT, 16 minutes before
MOZ012-260030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
650 PM CDT FRI MAY 25 1990

...ISOLATED STORMS ARE STARTING TO POP ACROSS ST LOUIS...

AT 650 PM...ONE OR TWO THUNDERSTORMS HAD DEVELOPED OVER SOUTH
SECTIONS OF THE ST LOUIS AREA.  WIDELY SCATTERED STORMS WILL
PERSIST IN THE AREA THIS EVENING.  MOST AREAS WILL REMAIN DRY
HOWEVER A FEW PLACES MIGHT RECEIVE A BRIEF SOAKING.

OTHERWISE...SEVERE STORMS HAD DEVELOPED WEST O/F COLUMBIA. THESE
STORMS ARE MOVING EAST AND COULD REACH THE ST LOUIS AREA AFTER
MIDNIGHT.

FELDT

Nearby

Severe Thunderstorm Warnings in Illinois, 1990Every severe thunderstorm warning in 1990

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.